Camila Domonoske

One of NASCAR's most popular drivers — and one of its most famous names — is leaving the racetrack. Dale Earnhardt Jr. announced Tuesday that he's retiring at the end of the season.

Earnhardt recently took a long break to recover from a series of concussions.

Just a few weeks ago, he told NPR he wasn't sure when he'd be leaving the sport.

Updated 3:40 p.m. ET

Senior lawmakers on the House Oversight Committee say Michael Flynn, the former national security adviser, appears to have violated the law when he took payments from groups associated with foreign governments.

Chairman Jason Chaffetz, R-Utah, and ranking member Elijah Cummings, D-Md., spoke at a news conference Tuesday, after they received a classified briefing.

"I see no data to support the notion that Gen. Flynn complied with the law," Chaffetz said.

Two Obama administration officials will testify in an open hearing before the House Intelligence Committee as part of ongoing investigations into Russian meddling in the 2016 presidential election.

The U.S. intelligence community has concluded that Russia attempted to help Donald Trump win the election. Investigations by the House, Senate and FBI are examining what exactly Russia did and whether the Trump campaign was involved, among other questions.

Robert Siegel, whose career with NPR has spanned more than four decades, will be stepping down as co-host of NPR's All Things Considered next year.

One of the most distinctive voices on NPR's airwaves, Siegel will be leaving the host's chair in January 2018. He has hosted the show for 30 years.

The U.S. Treasury Department has announced sanctions on 271 individuals it says are scientists working on weapons development for Syrian President Bashar Assad.

The new sanctions are a response to the deadly April 4 chemical attack in Khan Shaykhun, an attack the U.S. government accuses Assad of carrying out against civilians.

Updated 11:40 p.m. ET

Arkansas executed two inmates on Monday night, the first double execution in the U.S. since 2000.

The second inmate put to death was Marcel Williams. He and the prisoner executed just before him, Jack Jones Jr. — both convicted murderers — had filed last-minute appeals that were rejected by the U.S. Supreme Court.

Both the U.S. and Uganda have called off the search for notorious warlord Joseph Kony and his followers, the Lord's Resistance Army, saying that Kony's power has dwindled to the point that he's no longer a threat.

The group carried out brutal murders, rapes and mutilations, and was known for kidnapping children and forcing them to become soldiers. Uganda has been battling Kony and his followers for decades, and U.S. Special Operations forces joined the search for the warlord in 2011.

A viral video in 2012 brought Kony international infamy.

Updated at 2:41 p.m. ET

An Egyptian-American aid worker and her Egyptian husband have returned to the U.S. after being imprisoned for nearly three years in Egypt, over charges of child abuse that were widely regarded as specious.

German federal prosecutors say the bombing of a soccer team's bus in Dortmund, Germany, was carried out by a man apparently attempting to manipulate the team's stock for profit. The 28-year-old man has been arrested and charged with attempted murder, among other things.

Three explosions went off near the Borussia Dortmund team bus on April 11, as it was pulling out of the hotel where the players were staying. One player was injured and needed surgery on his wrist.

Updated at 8:05 p.m. ET

One police officer is dead and two seriously wounded after a shooting on Paris' famous Champs Elysees, in an incident that left one attacker dead. The assailant reportedly targeted a police vehicle. Authorities say a bystander was also wounded.

French prosecutor Francois Molins said the authorities have identified the shooter and are assessing whether the attacker had accomplices. Raids and searches were ongoing, Molins said.

Updated at 6:00 p.m. ET

General Motors has stopped operations in Venezuela after its only plant there was illegally seized by authorities, the automaker says in a statement. The details are murky: Multiple employees at the plant tell NPR that they believe auto dealers, not government officials, were responsible for the takeover.

The seizure happened Wednesday, as the "mother of all protests" brought hundreds of thousands of people into the streets to demonstrate against socialist President Nicolas Maduro.

This Tax Day, former Microsoft CEO Steve Ballmer launched a new tool designed to make government spending and revenue more accessible to the average citizen.

The website — USAFacts.org — has been slow and buggy for users on Tuesday, apparently due to the level of traffic. It offers interactive graphics showing data on revenue, spending, demographics and program missions.

Vice President Pence, visiting Japan on his 10-day tour of Asia, said the U.S. has launched bilateral talks with Tokyo in the hopes of reaching a new trade agreement.

It was Pence's second stop on the trip, which will later take him to Australia and Indonesia. He previously visited South Korea, where he emphasized the Trump administration's "resolve" on the North Korean nuclear threat, a theme he revisited in Japan as well.

Trade was also a major topic of conversation.

Two Kenyan runners, both of them making their Boston Marathon debut, have won the prestigious race.

Edna Kiplagat, a Kenyan policewoman and two-time world champion marathoner, finished first in the women's race with a time of 2:21:52. Rose Chelimo, a Kenyan-born Bahraini runner, placed second.

Geoffrey Kirui, also of Kenya, won the mens' race at 2:09:37 — his first-ever marathon victory. He edged out Portland runner Galen Rupp by 21 seconds.

It was a big day for debut runners at Boston, according to Runner's World.

Updated 10 a.m. ET Tuesday

Justices on the U.S. Supreme Court rejected a request by Arkansas to lift a stay that would have allowed officials to conduct the state's first execution in nearly a dozen years.

But while Monday's two scheduled executions were blocked, a path has been cleared for the state to carry out other killings scheduled this month; the next two are set for Thursday night.

As United Airlines continues to grapple with a long-haul public relations disaster, rival airlines are pouncing on the opportunity to poke fun and promote themselves.

The U.S. has dropped the most powerful conventional weapon ever used in combat to hit an underground ISIS complex in Afghanistan, Pentagon officials say.

The nearly 22,000-pound "MOAB" — standing for Massive Ordnance Air Blast, or as it's also known, the "Mother of All Bombs" — was designed during the Iraq War but had never before been used on the battlefield.

The U.S. has used the bomb's predecessor, a smaller but still massive weapon known as the "Daisy Cutter," in Afghanistan before.

Syrian President Bashar Assad continues to deny responsibility for a chemical attack in the town of Khan Shaykhun, claiming the attack was "100 percent ... fabrication" and video evidence showing choking victims is "fake."

He told Agence France-Presse this week that he wasn't even confident the dead children shown on video were "dead at all."

David Dao, the 69-year-old Kentucky doctor dragged off a United Express flight on Sunday night, suffered a concussion and broken nose in the incident and lost two teeth, his attorney said Thursday.

Dao will need reconstructive surgery, lawyer Thomas Demetrio announced at a news conference in Chicago.

He said there will "probably" be a lawsuit over the airline's actions.

During the 2016 presidential campaign the FBI obtained a secret warrant to monitor the communications of Carter Page, who was then serving as an adviser to Donald Trump, over concerns that Page was acting as an agent of Russia, according to a report from The Washington Post.

The reaction from the public started with gasps of horror and built to cries for a boycott.

Now, a day and a half later, United Airlines is admitting it did something wrong.

On Sunday night, a passenger on a United Express flight from Chicago to Louisville, Ky., was told he had to give up his ticket so a United crew member could take his seat. The man refused: He's a doctor and said he had patients he had to see.

White House officials say the U.S. intelligence community is confident that Syrian President Bashar Assad attacked his own people with chemical weapons on April 4 — and that an alternative explanation offered by Russia is an effort to deflect blame and "confuse the world community."

Senior administration officials "suggested that the attack may have been motivated by rebel gains in the surrounding area, as rebel forces approached a strategic Syrian air base," NPR's Scott Horsley reports.

Updated at 9:05 p.m. ET

Alabama Gov. Robert Bentley has resigned after pleading guilty to abusing his office, allegedly to conceal an affair with a political adviser.

Supernumerary District Attorney Ellen Brooks announced Monday that Bentley "pleaded guilty to two misdemeanor charges: failing to file a major contribution report, in violation of Code of Alabama §17-5-8.1(c); and knowingly converting campaign contributions to personal use, in violation of Code of Alabama §36-25-6." She added, "He has resigned from office."

Updated at 6:11 p.m. ET

Passengers on a United Express flight from Chicago to Louisville, Ky., were horrified when a man was forcibly removed — violently wrenched from his seat and physically dragged down the aisle — apparently to clear a seat for airline staff. Videos of the scene have prompted calls to boycott United Airlines.

On Twitter, a representative of the United said the flight in question was "overbooked" and that "one customer refused to leave."

A federal judge has approved a court-enforceable consent decree to institute reforms in Baltimore's troubled police department, over the objections of the Trump administration.

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